https://visualhunt.com/
2 - https://www.pexels.com/
3 - http://kaboompics.com/
4 - http://freestocks.org/
5 - https://morguefile.com/
6 - https://negativespace.co/
7 - https://gratisography.com/
8 - https://unsplash.com/
9 - https://stocksnap.io/
10 - https://pixabay.com/
11 - https://www.foodiesfeed.com/ (exclusivo para comidas)
12 - http://foter.com/
13 - https://www.freeimages.com/
14 - https://nos.twnsnd.co/ (imagens antigas)
15 - http://www.rgbstock.com/
16 - https://picography.co/
17 - https://www.splitshire.com/
18 - https://www.pexels.com/
19 - https://negativespace.co/
20 – http://www.pngtree.com (gratuito porem só pode baixar 3 imagens ou vetor por dia)
21 - http://photorack.net/
22 - https://www.freefoto.com/
23 - http://www.freepixels.com/
24 - http://www.public-domain-photos.com/
25 - https://freerangestock.com/
26 - http://www.publicdomainpictures.net/
27 - https://isorepublic.com/
28 - https://burst.shopify.com/
29 - https://gratisography.com/
30 - http://www.imcreator.com/free
31 - http://stokpic.com/
32 - http://en.freejpg.com.ar/
33 - https://negativespace.co/
34 - https://isorepublic.com/
>>> Categoria Multi sites
1 - https://isorepublic.com/
2 - http://allthefreestock.com/
3 - http://www.splashbase.co/

>>> Banco de imagens com licença free mas com obrigatoriedade de colocar atribuições
1 - https://picjumbo.com/
2 - https://www.stockvault.net/
3 - http://br.freepik.com/
4 - https://www.flaticon.com/
>>> Bando de imagens pagos
1 - https://br.fotolia.com/
2 - https://www.shutterstock.com/
3 - https://market.envato.com/
4 - https://br.123rf.com/
5 - https://www.deviantart.com/
6 - http://www.istockphoto.com/
7 - http://www.gettyimages.com/
8 - http://www.dreamstime.com/
9 - https://br.depositphotos.com/
10 - http://www.bigstockphoto.com/pt/
11 - http://500px.com (imagens podem ser comercializadas)